Amcor DC-900 User manual

Brand: Amcor

Model: DC-900

Type: User manual

Dehumidifier

DC-900 DC-900H

PROBLEM POSSIBLE REASON TROUBLE SHOOTING

The unit doesn’t work

at all.

1. Bad connection of the main plug (Part

#211).

2. Humidistat (Part #208) breaks down.

3. Water tank (Part #102) not positioned well.

4. Micro switch (Part #207) springs off.

1. Replug.

2. Check and repair or replace.

3. Re-place the water tank.

4. Check, repair or replace.

Compressor works,

but the fan doesn’t.

1. Bad wires connection.

2. Speed switch (Part #209) breaks down.

3. Fan motor (Part #202) not work at all.

4. Fan blade (Part #122) is stuck.

1. Re-connect & fasten them

firmly.

2. Check, repair or replace.

3. Replace.

4. Check and adjust.

Compressor doesn’t

work, only fan to

circulate the air.

1. Bad wire connection.

2. Overload protector of compressor breaks

down.

3. Starting relay of compressor breaks down.

4. Humidistat (humidity controller) breaks

down.

5. Compressor breaks down.

6. The unit is on the mode of “Anti-Frost” .

7. Anti-frost p.c. board breaks down.

1. Re-connect & fasten them

firmly.

2. Check and repair or replace.

3. Check and repair or replace.

4. Check and repair or replace.

5. Check and repair or replace.

6. Normal condition.

7. Check and repair or replace.

Noise too loud

1. Fan blades scratch the surrounding parts.

2. Fan Motor makes loud noise.

3. Fan motor screws get loose.

4. Compressor screws get loose.

1. Check and position Fan

blade well.

2. Repair/replace Fan motor.

3. Re-fasten screws.

4. Re-fasten screws.

Frost (Ice) formed

on the surface of

Evaporator.

1. Insufficient refrigerant.

2. Anti-frost p.c. board is out of function

(below 16°C).

3. Dusty filer.

1. Find out and repair the

leakage, then recharge the

unit.

2. Check and repair or replace.

3. Clean the filter.

How to?

REPLACE THE

COMPRESSOR

1. Take out the filter, remove the rear plate.

2. Take off the cover of overload protector, take

off the wire terminals and screws of the earth

wire.

3. Use soldering iron to take off the discharging

tube and suction tube from the compressor.

4. Unfasten the screws on the compressor.

5. Replace the compressor.

6. Re-assemble the unit in opposite process from

above

7. Vacuum the unit, then recharge the refrigerant.

* Please refer to the rating label at the rear of

the unit for correct refrigerant volume.

** Before soldering, need to clear out the

refrigerant completely.

REPLACE THE OVERLOAD PROTECTOR &

STARTING RELAY

1. Take off the cover of the overload protector

(Part #201A), take off the wire terminals.

2. Take out the starting relay and overload

protector.

3. Replacing with a new, fine one.

4. Re-assemble the unit in opposite process from

above.

REPLACE THE ANTI-FROST P.C. BOARD &

INDICATOR

1. Pull out the water tank, take off the filter, remove

the front & rear plates.

2. Take off all the wires terminals.

3. Replacing the defect anti-frost p.c. board &

indicator.

4. Re-assemble the unit in opposite process from

above

Notice! Do not insert the wire terminals in the

wrong position.

REPLACE THE MICRO SWITCH

1. Take out the filter, remove the rear plate.

2. Separate the relative wires surrounding the

micro switch and take off the micro switch

(part no. 211) from the middle spacer.

3. Replacing with a new one.

4. Re-assemble the unit in opposite process

from above.

REPLACE THE FAN MOTOR

1. Pull out the water tank, take off the filter, remove

the front & rear plates.

2. Take off the sensor fixer (part no. 117) & up

wind funnel.

3. Take out the fan motor from the motor fixer.

4. Replace the motor.

5. Re-assemble the unit in opposite process from

above.

REPLACE THE HUMIDISTAT & FAN SPEED

SWITCH

1. Pull out the water tank, take out the filter,

remove the front & rear plates.

2. Unfasten the wire terminals.

3. Take off the Electronic Cover (Part #110) and

loosen all relative screws.

4. Take off the defect humidistat or speed switch

from Front Grill (Part #103).

5. Replace with a new one.

6. Re-assemble the unit in opposite process from

above.

Notice ! Do not insert the wire terminals,

knob, switch in the wrong position.

CLEAN THE DUST ON THE EVAPORATOR &

CONDENSER

1. Pull out the water tank, take off the filter, remove

the front & rear plates.

2. Take off the up wind funnel & fan motor.

3. Use high pressure N

to blow off the dust on the

evaporator and condenser.

4. Use water to clean the evaporator and

condenser.

Notice ! Before you clean the evaporator and

condenser with water, make sure the motor has

been taken off. The electric part is not allowed to

touch with water.

CLEAN THE COOLING SYSTEM

1. Pull out the water tank, take off the filter,

remove the front & rear plates.

2. Using soldering iron to separate the capillary

tube from the dryer.

3. Connect a repair valve (with pressure gauge)

on the copper tube of the compressor.

4. Filling 0.8 ~ 1.0 Mpa N

into the inlet of the

fixing valve to clean the cooling system.

Notice ! Before soldering, you have to vacuum the

unit completely.

RELEASE THE REFIRGERANT

1 For the unit with recharging value, you can

discharge the refrigerant directly by the value.

2 For the unit without the value, please:

2.1 File the copper tube of the compressor.

* Do not file the copper tube off

completely, as long as there is an

opening is enough.

2.2 Use a tongs to clamp the copper tube,

the refrigerant will be released then.

Caution!

1. Whenever examine or replace the spare parts

of Cooling system, it is strictly necessary to

clean out the refrigerant

2. Never use air solder to solder the copper tube.

And to prevent from danger, please proceed the

releasing in a place with good ventilation and

away from fire.

3. If you need to repair or replace the parts of the

cooling system, please wait 10 minutes after the

refrigerant is released. Please use a soldering

iron to solder off the connection. *Please do not

use file to open the tubes, otherwise, the

system will be contaminated by small pieces of

metal.

4. As long as the tubes is opened, please use a

plastic film (such as plastic bag) to cover it

immediately. However, if you will not

re-assemble the parts in a short time, you

should use a plastic bag to cover its opening

instead, in order to keep it from contaminated

completely.

VACUUM & CHARGE THE REFRIGERANT

1. Take out the filter, remove the rear plate.

2. Connect the copper tube of compressor, quick

coupler, fixing value, vacuum pump and refrigerant

bottle. (Please refer to the drawing shown at right.)

3. Weigh the refrigerant amount by an electronic scale,

write down the amount.

4. Open the valve A & B of the fixing valve. Close the

valve of the refrigerant bottle, then open the vacuum

pump.

5. After 20 – 30 minutes, when the vacuum density is

higher than 133Pa, close the valve A of the fixing

valve, then close the vacuum pump.

6. Open the valve of refrigerant bottle first, then open

valve B of fixing valve slowly, the refrigerant will enter

the cooling system then.

7. When the charging amount is equal to the amount

mentioned in the rating label, close valve B of fixing

valve and valve of refrigerant bottle immediately.

8. Tong the charging tube between the compressor and

quick coupler completely. Notice! The charging tube

must be closed completely, otherwise, the refrigerant

will leak out.

9. Take off the quick coupler. Clamp the end of charging

tube flat

10. Soldering the end of the charging tube (which you

clamped it flat previously) to prevent it from leakage.

冷

HOW TO DETECT THE LEAKAGE OF REFRIGERANT?

1. Wipe the soap water of high density on the soldering

parts of the cooling system and the other parts which

are easy to have leakage.

2. The soap water will bubble when there is a leakage.

Notice! When the leakage is found, do not solder it

directly.

3. If no leakage is found by the soap water, it only

means there is no major leakage on the cooling

system. You may use a professional detector to

detect it again.

HOW TO ADJUST THE COOLING SYSTEM IS BLOCKED ?

1. Measure the temperature in front of & behind the dryer. If the temperature difference is too big, then it

means the dryer is blocked. Please change it.

2. Check the capillary is cool or not. If it is cool partially, it means, the capillary is blocked partially. If the

capillary is not cool at all, it means, the capillary is totally blocked.

HOW TO ADJUST THE REFRIGERANT IS TOO MUCH ?

1. Power consumption is much higher than the standard.

2. Working current is much higher than the standard.

3. Suction pressure is too high.

4. Thick ice forms on the evaporator.

5. Part of the condenser is hot.

6. Suction tube of the compressor is freezing.

Notice ! Above judgement should be made under the standard condition or similar condition.

HOW TO ADJUST THE REFRIGERANT IS INSUFFICENT OR HAS LEAKED ?

1. Power consumption is too low.

2. Working current is too small.

3. Suction pressure is too low.

4. Few ice or no ice on the evaporator.

5. Upper part of the condenser is warm, down part of the condenser is not warm.

6. Suction tube of the compressor is not cool.

Notice ! Above judgement should be made under the standard condition or similar condition.

HOW TO REPAIR THE DEFECT HEATER SET?

1. Take off the Rear Plate, loosen screws.

2. Take off defect Heater Set and replace new one.

3. Re-Assemble the unit in opposite process from

above.

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